HAAS® Alarm limit — TRAVEL LIMIT — Hardware overtravel switch hit
Part of: our HAAS® alarm reference · covering 60 of the most common alarms.
What it means
The axis physically tripped a hardware limit switch at the end of travel. The machine has stopped to prevent damage. More serious than a soft limit.
Common causes
- Soft limits got past somehow
- Crash or runaway
- Limit switch out of position after a service
What to check first
- Stop and inspect the axis for any damage
- Use the override key (or service mode) to back the axis off the switch slowly
- If it happened during normal operation, find the cause before trying again
Prevention
Most overtravel alarms are programming or setup issues, not machine faults. Build a habit of always confirming your tool length offsets and active work offset before pressing cycle start — especially after a tool change or a fixture swap. On 5-axis machines, simulate moves before running them; trunnion clearances are easy to misjudge.
If you’re still stuck
If you’ve worked through the checks above and the alarm hasn’t cleared — or if it cleared and came back — that’s the point to call. Persistent alarms after a reset usually mean a real component fault, and pushing through them risks turning a simple repair into a bigger one. Keith covers HAAS® breakdowns across the UK with same-day phone diagnosis.
A note on this guide. Alarm wording and numbering can vary by HAAS® machine model and software revision. The descriptions here are written in plain English to help you understand what the machine is reporting and what to check first — they’re not a substitute for the official HAAS® operator manual or for a qualified service engineer’s diagnosis. Always confirm the exact alarm message on your screen and consult your machine’s documentation before attempting any repair.